SOUND BUT NO VIDEO SCREEN CAPTURE. CAMTASIA STUDIO 9

Hello,It is the second time I came accross this issue. I have the sound recorded but not the screen capture video.I have tried all combinaisons of tools set up but I always end up with a black screen.Thanks for your help

I just did a search of our ticketing system for the email address that is on file for your community ID and there were no tickets; can you please provide me with the Ticket # (may be called "Incident #"), found in the Subject line of the email that all users that submit a ticket to https://support.techsmith.com/ receive so I can look into this issue for you?